#nb_icon_wrap{
  height: 40px !important;
  width: 40px !important;
}
.nb-icon-right-bottom {
  bottom: 10% !important;
}

/* 适配最大宽度 */
.screen-width {
    max-width: 750px;
    margin: auto;
    left: 0;
    right: 0;
}

.flex {
    display: flex;
  }
  
  /* 主轴的方向 */
  .flex-row {
    display: flex;
    flex-direction: row;
  }
  
  .flex-col {
    display: flex;
    flex-direction: column;
  }
  
  /* 换行 */
  .flex-wrap {
    flex-wrap: wrap;
  }
  
  .flex.grow>* {
    flex: 1 0 0;
  }
  
  .flex>.fill, .flex-row>.fill, .flex-col>.fill {
    flex: 1 1 auto;
  }
  
  .flex>.fixed, .flex-row>.fixed, .flex-col>.fixed {
    flex: 0 0 auto;
  }
  
  /* 主轴对齐方式 */
  .space-between {
    justify-content: space-between;
  }
  
  .space-around {
    justify-content: space-around;
  }
  
  .flex-start {
    justify-content: flex-start;
  }
  
  .flex-end {
    justify-content: flex-end;
  }
  
  .flex-center {
    justify-content: center;
  }
  
  /* 交叉轴对齐方式 */
  .items-middle {
    align-items: center;
  }
  
  .items-top {
    align-items: flex-start;
  }
  
  .items-bottom {
    align-items: flex-end;
  }
  